In our continuing series looking at the latest medical research and news on COVID-19, we speak with UCSF’s Dr. Peter Chin-Hong.

Today’s topics include:

• Transmission rate spike spurs fear of new coronavirus surge in LA County 

• Vaccinated people can get COVID-19, but it’s most likely very rare 

• Flu shots are linked to a drop in COVID-19 infections, and scientists aren't sure why 

• California's vaccine eligibility is expanding — if you live in the right places 

• California COVID-19 cases fall amid New York, Florida surges 

Guest:

Peter Chin-Hong, M.D., infectious disease specialist and professor of medicine at the UCSF Medical Center; he tweets @PCH_SF